The fact that more tropical rain falls on the Northern Hemisphere than in the south has been linked to ocean currents, overturning the previous theory that it was caused by the shape of the ocean basins

A new study published in Science suggests that the middle depths of the Pacific Ocean have warmed 15 times faster in the past 60 years than they did during apparent natural warming cycles in the previous 10,000

Average summer temperatures experienced by the eastern Canadian Arctic during the past century are higher than they have been at any time over the past 44,000 years, and perhaps as long ago as 120,000 years